Hand saw



Aug. 20, 1935. I D OKRQS 2,012,201

I HAND SAW- Filed Aug. 8, 1954 Patented Aug. 20, 1935 HAND SAW r e Dezso0kros,- Regina, Saskatchewan, Canada Application August 8, 1934, SerialNo. 739Q029 1 Claim." (01. 145 34) e e 'dle adjusted at substantiallywith respect to This invention relates to certain new and usefulimprovements in hand'saws of the'removableblade type employing aU-shaped frame.

The primary'object of this invention is to provide a ,hand saw of theabove mentioned character having a handle capable of being angularlyadjusted in'a vertical and horizontal plane;

A further object-ofthis invention is to provide a saw of the abovementioned character comprising-a handle having means for locking thehan-' dl'ewi'th respect to the saw in adjusted position.

A further object'of this invention is to provide a'hand saw including aU-shaped frame having one of the legs thereof adjustable wherebydifferent sizes of blades may be employed and the blade may be stretchedto different desired tension.

,A' still further object of this invention is to provide a saw of theabove mentioned character having one of the blade holding blocks forminga securing means for the handle whereby the handle may be adjusted forthe simultaneous tensioning of the saw blade.

7 A still further object of this invention is to provide a U-shaped handsaw having novelly constructed blade holding blocks to preventacciden- 1tal rotation of the blade.

Other objects and advantages of the invention will become apparentduring the course of the following description, forming a part of thisspecification and taken with the drawing, wherein,

Figure 1 is a side elevational view of the hand Figure 4 is a verticalcross-sectional view taken on line 4-4 of Figure 1, looking in thedirection of the arrows illustrating the joint or connection betweenadjustable handle and leg of the saw,

greatly enlarged for the purpose of disclosing details of construction;

Figure 5 is a transverse cross-sectional .view taken on line 55 ofFigure 1, looking in the direction of the arrows, illustrating thelocking connection for the adjustable handle and showing .the lockingtongue in position for normal use;

Figure 6 is a similar viewillustrating the han- I Figure '7 isanenlarged vertical view of the handle, showing the same removed the.U-shaped saw frame;

side elevational from the U-shaped sawframe and illustrated in crosssection to more clearly illustrate the joint or connection between thetwo-parts forming the handle; and Figure 8 is an'enlarged fragmentaryview of v the handle illustrating a portion thereof in cross-. sectionto more clearlydisclose the form of con- .'erence' characters will beemployed to designate like parts throughoutthe same, the referencecharacter it will generally be employed to des-' ignate a frame bar of ahand saw having one end provided with an angular extension H and theopposite end toothed as at 2. Slidably secured upon the free end of theframe bar I!) is a leg i3 having an opening min the form of a slotextending angularly through the leg I3 so a clamping action will occurwhen the leg 13 is' drawn toward the angular extension H.

Formed in the free end of the angular extension H is a conicalopening 15adapted to'receiv'e a correspondingly shaped plug 16 having one endsquared as at H andrbifurcated as at 18 while the opposite end is screwthreaded as at 1 19 for receiving the wing nut 20. It will be noted 1that the block 81 is slotted vertically and horizontally for receiving asaw blade 2! adapted to be held in place by a, pin 22 extending throughthe slot l8 and through an aperture formed in the blade 2 l tion of theleg l3 adjacent the bottom thereof is provided withan annular recess25.-

The handle comprises a frame portion 25 on which is formed integral afluted conical boss 1 2! surrounded by an annular projection 28. Thefluted conical boss 21 is adapted to be received within the flutedconical opening 24 and the annular projection 28 is adapted to bereceived 5 within-the, recess 25 formed in the leg [3 of the saw frame.The handle also includes a handthe handle frame portion 26 by hinge pinsStand 3!, and the free ends of the hand-grip 29 are flattened as at 32and 33 and are provided with ENT OFFICE v The lower end of the blade i3is provided with I an annular boss v23 having a conical opening thereinprovided with ribs or flutes 24 and a porv grip portion '29 which ishingedly connected to p circular recesses for receiving the flattenedend portions 34 and 35 of the handle frame portion 26, whereby thecomplementary faces 32 and 34 also 33 and 35 will swing in a horizontalplane with respect to each other about the pivot pins 39 and 3!, thepivot pin 3| is provided with a tongue 36 rigidly secured thereto andadapted to move with the grip 29 so that the tongue 36 may be receivedin similarly shaped depressions 3"! formed in a circular portion 38 ofthe handle frame 29. Extending through the fluted boss 21 is an opening,squared as at 39 for a portion of its length terminating in a circularportion 49 whereby the squared end 4! of the saw blade the blade 2| maybe received therein and held by means of a transverse pin 41. It will bereadily noted that tightening upon the wing nut 44 to turn the same downupon the screw threaded portion 43 of the blade holding block 45 willsimultaneously tighten the handle frame 26 and also place the blade 2|under tension.

If it is desired to adjust the handle grip 29 with respect to the sawframe In, the screw 39 may beloosened from the tongue 36 to move out ofthe central opening 31 and move into one of the lateral openings shownin Figure 6. Should it be desired to adjust the handle grip 29 axiallywith respect to the saw blade 2|, the wing nut 44 may be loosened andthe hand grip 29 rotated or turned to an adjusted position whereby theflutes 2? will be received within the recesses 24 in the leg 13 of thesaw frame. Upon tightening of the-wing nut 44, the handle frame 26 willbe locked in its adjusted position and upon further tightening of thewing nut 44, the blade 21 may be tightened to the desired tension.

Itis to be understood that the form of the invention herein shown anddescribed is to be taken as the preferred embodiment of the inventionand that various changes in the shape, size and arrangement of parts maybe resorted to without departing from the spirit of the invention or thescope of the sub-joined claim.

I claim:-

A hand saw comprising a U-shaped frame, one leg of which is capable ofsliding adjustment, a blade mounted in the frame, blade holding blocks,each having a threaded end, a hand grip having a fluted conical boss, anannular flange surrounding the boss in spaced relation thereto, theadjustable frame leg having an opening therein shaped to interfittinglyreceive the conical boss and surrounded by an annular groove to receivesaid annular'fiangas'aid boss havingan opening therein for receiving thethreaded end of one of the blade holding blocks, a wing nut threaded onthe end of the adjacent blade holding block and means for anchoring theother blade holding block in the other end of the U-shaped frame.

DEZSO OKROS.

